Improved lathe-bath and sponge-holder for dentists  use



altitud gaat tentent.

D.' MURLLESS, oFrioLYoKr.,A MASSACHUSETTS.

Letterslatent .N 96,467, dated November 2, 1869.

IMPROVED LATES-BATH AND SPONGE-HOLDER FOR DENTISTS' US.

The Schdule referred to iu these Letters Patent and rvnakng part of the same.

To all whom it nifty concern.: L

Be it known that I, D. MURLLESS, of Holyoke, in the county ot' Hampden, and Commonwealth of Massachusetts, have invented a new and improved Lathe- Bath and Sponge-Holder for Dentists Use; and I do herebyl declare that the following is a t'ull, clear, and exact; description thereof, retirence being had to the aceon'ipanying drawings, making a part ot' this specification, and to the letters` of reference marked thereon, in which- Il igure 1 is a plan view ot saidinvention;

Figure 2 is a vertical sectional vicw, the pla-ne of section being indicated by the line a: a: iu iig. l; and

Figure 3 is a transverse sectional view, the plane ot' vertical section being indicated by the. line y yin lig. 1.

In the practice of dentistry, small revolving wheels, of eoruuduni or like hard sl1bsta Iiee, ai-e constantly in useior cutting and shaping aititicial teeth, and for general grindiiig-purposes, andthe high speed at which i such wheels are driven, (generally by a ioot-treadle,)

and the hardness ot' the. substances ground upon them, malte frequent wetting necessary, both to wash the wheels ii-oui the porcelain grit and to keep them cool.

lo provide a. receptacle i'or the water, and to furnish means for thoroughly and constantly wett-ing such wheel, when revolving, is the object. ot' myinvention.

'lhe construct-ion ot' said device is as follows:

'A small trough, A, preferably oi'cast-inetal, is supported at the proper height above the. workfbench by means ot' the upright rod C passing through an opening in the ear al, which is cast' upon the trough, and the. set-screw o.

To allow some movement of the .support G upon the work-bench, it is set in the slotted base B, which is held t'ast to the bench by a tlnunb-screw, so that the whole device can be swung round out of the way, it' necessary.

As it is desirable to be able to apply the water to either side ot' the wheel, and either at the front or the rear face, I provide t'oursponge-holders, l-I, H, H, and H2, each of which furnished with a round stein, E.

The side holders H H are made alike, being simply curved plates for binding the small strips ot' sponge I I upon.

The holder H1 is made T-shaped, while H2 is curved in the direction of its length, and may be turned at right angles to the. position shown intig. 1, so as to cover a considerable aro upon the periphery of the corundum wheel.

As soule grinding is done upon the sides ot' the wheel as well as upon the. face, the. side sponge -holders H H may also be turned at a greater or less angle to the positions shown in tig. Las also may the holder H. In tine, the arrangement of the four sponge-'holders is sur-h that any number of them may be put into Contact with the wheel at once, while the rest are thrust outI ot' the way; and further, those in contact can be turned into the position which will wash the wheel most effectluilly.Vv

To sustain the stems E E of the sponge-helders,`

cars (l. a a (t are cast, at four points, upon the.trou' ,zh,v in the upper surt'ace ot' each of which is a dovetailed recess, into which a` nictallie'cap, I), slides, itssdes being bevellcd to tit the dort-tailed recess. v

A round hole is made in each ear and its cap, (see fig. 2,) iu which the stem E slides, and is also revolved, it' necessary.

'lo hind the stem and cap in place, when properly set, a set-screw, s, is applied to each, as shown in the drawings, one of the set-screws, s, being placed in the cap 1) tor convenience ot' acess, while the other three are. tapped into the ears a from the under side.

Itis evident, that by turning the set-screw, the stem willbe prevented from luoviug, while the. edges of the cap will be tbreed up against the bevelled sides ot' the. dovetailed recess, and tirmly held.

It. will also he obvious, that the means of adjustmentare so numerous that the operator can iind no dtiicultyv in adapting the device to any work he may have in'hand, without rising from' his work-bench, and that all throwing ofthe water by the centrifugal torce. ofthe corundum wheel, and all necessity t'or using one hand to wet the wheel, are. entirely avoided.

I ain aware that the'caps 1) D may he cast as a, part. of the ears a a, and with less expense, but I pret'er toemploy the loose eapto allow a more perfect adjustment ofthe sponge-holders.

For the support ofthe end spouges, I have, in some cases, substituted, for thc-end holders H H", hereiu betere described, simple wires, stretched across the ends ot the trough ti-om side to side, and tor some purposes ot' dentists practice, I believe thisl change to. be advantageous.

Having described my invention, i

\Vhat I claim as new therein, and desire to secure by Letters Patent, isy 'lhe water-trough A, supported so as to be adjustable beneath the eorundum wheel, and having ears a, n, in combination with thespolige-holders Il H' H2, stems E, and set-screws s, the whole constructed and arranged substantially as set forth. Y

1n witness whereot', I have hereunto set my hand, this lst day ofv February, A. D. 1869.

l D. MURLLESS.

Witnesses:

- GrH. POMEROY, J. P. BUCKLAND. 

